<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="item in shopList" :key="item.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              @change="updateCartChecked(item)"
              name="chk_list"
              :checked="item.isChecked"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="item.imgUrl" />
            <div class="item-msg">
              {{ item.skuName }}
            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">默认参数</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ item.cartPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="updateCartNumber(item.skuId, -1, item)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="item.skuNum"
              minnum="1"
              class="itxt"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="updateCartNumber(item.skuId, 1, item)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ item.cartPrice * item.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a @click="deleteCart(item)" class="sindelet">删除</a>
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ selectGoods.selectNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ selectGoods.total }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="/trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import {
  getShopCart,
  updateCartChecked,
  updateCartNumber,
  deleteCart,
} from "../../api/shopcart";

export default {
  name: "ShopCart",
  data() {
    return {
      shopList: [],
    };
  },
  mounted() {
    getShopCart().then((res) => {
      if (res.length > 0) {
        let shopList = [];
        res.forEach((item) => {
          // 拿到所有的购物车信息
          // 登录的和没登录的
          shopList = [...shopList, ...item.cartInfoList];
        });
        this.shopList = shopList;
      }
    });
  },
  computed: {
    selectGoods() {
      // 拿到选中的产品
      const selectGoods = this.shopList.filter((item) => item.isChecked === 1);
      let total = 0;
      // 计算选中几个商品
      let selectNum = selectGoods.length;
      //计算总价
      selectGoods.forEach((item) => {
        total += item.skuPrice * item.skuNum;
      });
      return {
        total,
        selectNum,
      };
    },
  },
  methods: {
    // 改变商品选中转改
    updateCartChecked(cart) {
      cart.isChecked = 1 - cart.isChecked;
      updateCartChecked(cart.skuId, cart.isChecked);
    },
    // 改变商品数量
    updateCartNumber(skuId, num, cart) {
      cart.skuNum += num;
      //如果修改后的数量小于等于0 则前端设置为1 并不修改服务端数据
      if (cart.skuNum <= 0) return (cart.skuNum = 1);
      updateCartNumber(skuId, num);
    },

    // 删除商品
    deleteCart(cart) {
      if (confirm(`是否确认删除${cart.skuName}此数据`)) {
        // 在服务器删除数据
        deleteCart(cart.skuId);
        //在前端也要删除
        this.shopList = this.shopList.filter(
          (item) => item.skuId !== cart.skuId
        );
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 4.1667%;
        }

        .cart-list-con2 {
          width: 25%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .cart-list-con3 {
          width: 20.8333%;

          .item-txt {
            text-align: center;
          }
        }

        .cart-list-con4 {
          width: 12.5%;
        }

        .cart-list-con5 {
          width: 12.5%;

          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }

          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 12.5%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 12.5%;

          a {
            color: #666;
          }
        }
      }
    }
  }

  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>
